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Description

It's not cool to be hot.

If it's hot out, and you're not wearing a base layer, you're doing it wrong. A proper base layer, like the Castelli Seamless Sleeveless Base Layer, will efficiently manage moisture and actually keep you cooler.

To achieve the aforementioned, Castelli constructed the base layer from two fabrics, polypropylene and nylon. As you might imagine, the materials express a duality to the base layer's function -- pulling and drying. Accordingly, the inner-layer is comprised of the polypropylene material. This fabric effectively pulls moisture away from the skin, transferring it to the outer-layer of nylon. Why nylon? Because its lightweight, airy composition is an efficient evaporator, drying quicker than most materials. So, instead of simply soaking in your sweat, the base layer keeps you cooler by evaporating moisture next to the skin. This has been furthered by the three different mesh patterns on the base layer. Taking anatomy into account, this system maintains a consistently open mesh in order to provide the most ventilation possible. Accordingly, this keeps you cooler, as well. Don't believe us? It's time for an experiment. Blow on the back of your hand while dry, and now blow on the same spot after applying a minimal amount of moisture? Cooler right? Well, that's basically the principle behind this base layer.

The Castelli Seamless Sleeveless Base Layer is available in the color White and in the sizes Small/medium, Larg/x-large, and XX-Large.

Tech Specs

Material:

[inner layer] polypropylene, [outer layer] nylon

Fit:

next-to-skin

Length:

waist

Antimicrobial Treatment:

no

Thumbholes:

no

Claimed Weight:

[size large] 57 g

Recommended Use:

road cycling

Manufacturer Warranty:

30 days

Size chart

Castelli

Men's Apparel

Small

Medium

Large

X-Large

2X-Large

3X-Large

Chest

35.5 - 37in(90.2 - 94.0cm)

37 - 38.5in(94.0 - 97.8cm)

39 - 41in(99.1 - 104.1cm)

41 - 43in(104.1 - 109.2cm)

43 - 45in(109.2 - 114.3cm)

45 - 47in(114.3 - 119.4cm)

Waist

29.5 - 31.5in(74.9 - 80.0cm)

31 - 33in(78.7 - 83.8cm)

33 - 35.5in(83.8 - 90.2cm)

35.5 - 37.5in(90.2 - 95.3cm)

38.5 - 40.5in(97.8 - 102.9cm)

41 - 43in(104.1 - 109.2cm)

Hips

36.5 - 38.5in(92.7 - 97.8cm)

38 - 40in(96.5 - 101.6cm)

40 - 42in(101.6 - 106.7cm)

42 - 44in(106.7 - 111.8cm)

44 - 46in(111.8 - 116.8cm)

46 - 48in(116.8 - 121.9cm)

Inseam

31.5in(80.0cm)

32in(81.3cm)

32.3in(82.0cm)

32.8in(83.3cm)

33in(83.8cm)

34.8in(88.4cm)

How to Measure:

For best results, take measurements over your underwear.

Chest:

Measure under your arms, around the fullest part of your chest.

Waist:

Measure around your natural waistline, keeping the tape a bit loose.

Hip:

Measure around the fullest part of your body at the top of your legs.

Inseam:

Using pants that fit well, measure the crotch seam to the bottom of the leg.

Have an answer for Perry Taylor?

Must have in summer

Familiarity:
I've put it through the wringer

This base layer is like having air conditioning in the summer! It creates space between your body and your jersey to allow air to flow in between and cool your skin. It also pulls the sweat off your body. Makes a big difference when riding in 90-100 degree temps. I am 6'3", 195 lbs and went with the L/XL as the piece stretches and you want it to fit tight.

A better view of the baselayer

Comment on Chris S's photo:

This baselayer won't overheat you

I never would have thought that a baselayer would be a good thing to have, but a crash where I got road rash on my back showed me otherwise. An extra layer might have spared me a week of road rash healing.

But...a baselayer for hot weather? Crazy! But not really. The mesh construction lets air flow freely, helping keep me cool. Most telling, my torso feels reasonably dry during the ride but when I take the jersey off it's soaked. So the baselayer transfers sweat outward.

The material's stretchy, so as small as these are they're more forgiving than they look. But don't wear these minus the jersey unless you want weird looks.